I'm having the same issue. One thing you may want to look at is the flex valve. There is a threaded component (see page 19 of manual - Item 61) that may be loose. In addition, after 8,000-10,000 shots, the manual recommends greasing the regulator piston (item 63). I did this, and it helped. The other item I found that was effecting performance was the ball detent (ball lock - See item 10 on pg. 21 of manual). was broken. Hope this helps.